PROBLEM TO BE SOLVED: To provide a control circuit of an electric hydraulic type grab bucket which transmits a signal indicating that an oil pressure of a hydraulic oil exceeds a predetermined value to an operation part without additionally providing a cab-tire cable and a cable reel.SOLUTION: A control device 17 of an electric hydraulic type grab bucket includes: a first circuit 17a provided at a grab bucket 1; a second circuit 17b provided at a junction box 7 of a building 2; and a third circuit 17c provided at an operation part 9. The first circuit 17a has a transmission part 18 which wirelessly transmits a pressure exceeding signal P output by a pressure switch PS when an oil pressure of a hydraulic oil exceeds a predetermined value. The second circuit 17b relays the pressure exceeding signal P to the third circuit 17c through a preliminary line of a cable 7a. The third circuit 17c stops opening/closing operation of the grab bucket 1 on the basis of the relayed pressure exceeding signal P.SELECTED DRAWING: Figure 3

    【課題】作動油の油圧が所定値を超えたことを示す信号を、キャブタイヤケーブルやケーブルリールを増設せずに、操作部に伝達できる電動油圧式グラブバケットの制御回路を提供する。【解決手段】電動油圧式グラブバケットの制御回路17は、グラブバケット1に設けられた第1回路17aと、建屋2の中継ボックス7に設けられた第2回路17bと、操作部9に設けられた第3回路17cとを備える。第1回路17aは、作動油の油圧が所定値を超えたときに圧力スイッチPSが出力する圧力超過信号Pを無線で送信する送信部18を有し、第2回路17bは、圧力超過信号Pをケーブル7aの予備線を介して第3回路17cに中継し、第3回路17cは、中継された圧力超過信号Pに基づいてグラブバケット1の開閉動作を停止させる。【選択図】図3


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    Title :

    CONTROL CIRCUIT OF ELECTRIC HYDRAULIC TYPE GRAB BUCKET


    Additional title:

    電動油圧式グラブバケットの制御回路


    Contributors:

    Publication date :

    2016-11-10


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B66C Krane , CRANES



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